A devoted Bronx dad was stabbed to death in front of his horrified wife and young son in an attack by cold-blooded assailants who’d followed the family home from the grocery store, police said yesterday.

Raul Rolon, 37, an electrician, had been shopping for dinner with his wife, 10-year-old son and a friend of the boy at 5:45 p.m. Wednesday when he confronted a group of men who were lurking around his car, police said.

Rolon shooed the men away — but was followed home by at least two assailants who pounced on him as he and his family got off the elevator on the ninth floor of the Castle Hill Houses, police said.

Efrain Soler, 18, and William Cain, 26, both of The Bronx, were charged with murder, manslaughter and weapons possession. Soler was held without bail yesterday. Cain’s arraignment was expected today.

Yesterday, neighbors grieved at a memorial outside the complex, where candles and messages of grief were left. Etched on the front of the building were the words: “Rest in Peace Raul. Love you. You may be gone, but never forgotten. Bless you.”

Ronald Discua, 35, who lived next door to Rolon for the past 12 years, was devastated by the slaying.

“He usually stops and picks up the groceries on his way home and cooks for his family,” he said.

Law enforcement sources said Rolon had an in-law who is a lieutenant in the NYPD.